From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Courbot Subject: Re: [PATCH V4 0/9] Add mandatory regulator for all users of pwm-backlight. Date: Wed, 20 Mar 2013 11:24:48 +0900 Message-ID: <51491DF0.10408@nvidia.com> References: <1363719573-20926-1-git-send-email-achew@nvidia.com> <20130320021442.GB20443@S2101-09.ap.freescale.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20130320021442.GB20443@S2101-09.ap.freescale.net> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Shawn Guo Cc: "romain.naour@openwide.fr" , "thierry.reding@avionic-design.de" , "philipp.zabel@gmail.com" , "gxt@mprc.pku.edu.cn" , "robert.jarzmik@free.fr" , "laforge@openezx.org" , "openezx-devel@lists.openezx.org" , "linux@arm.linux.org.uk" , "marek.vasut@gmail.com" , "linux-arm-kernel@lists.infradead.org" , "lost.distance@yahoo.com" , "drwyrm@gmail.com" , "swarren@wwwdotorg.org" , "haojian.zhuang@gmail.com" , "kgene.kim@samsung.com" , "linux-tegra@vger.kernel.org" , eric. List-Id: linux-tegra@vger.kernel.org On 03/20/2013 11:14 AM, Shawn Guo wrote: > On Tue, Mar 19, 2013 at 11:59:24AM -0700, Andrew Chew wrote: >> Many backlights are enabled via GPIO. We can generalize the GPIO to a >> fixed regulator. >> > I think we should push the series of "Runtime Interpreted Power > Sequences" moving forward, which should be useful this case and many > other cases as well. > > http://thread.gmane.org/gmane.linux.kernel/1395912 That's still the medium-term plan. But doing this correctly requires some improvements to be done in the GPIO subsystem, which I am pushing at the moment. Eventually power sequences should handle this kind of scenario, but by the meantime it cannot hurt to get the job done. Alex.